Back-spacing mechanism for paper-carriages.



0. THIEME.

BACK SPAOING MECHANISM FOR PAPER CARRIAGES.

APPLICATION FILED APIL7, 1913. 1,096,074. Patented May 12, 1914.

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W 1? 6.5,- gzif 0. THIEMB.

BACK SPAGING MECHANISM FOR PAPER GAERIAGES.

APPLICATION FILED APR. 7, 1913.

Patented May 12, 1914.

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UNITED STATES Parana UFFIQE OTTO THIEME, OF ST. LOUIS. MISSOURI, ASSIGNOR TO -MOONHOPKINS 'BILLING MACHINE COMPANY, OF ST. LOUIS, MISSOURI. A CORPORATION MISSOURI.

BACK-SPACING MECHANISM FOR PAPER-CARRIAGES.

Specification of Letters Patent.

Patented May 12, 191 4.

Application filedApril 7, 1913. Serial No. 759.495.

To all who! it may mare/n Be it known that I, OTTO THIEME, a citizen of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Back-Spacing Mechanism for Paper-Carriages, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertainsto make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is a rear elevational view of my improved back spacing mechanism. Fig. 2 is a side elevational view of the same. Fig. 3 is a rear elevational view. Fig. 1 is a de tail view of the clutch. Fig-5 is a top plan view of the tappet.

This invention relates to a new' and useful improvement'in back spacing mechanism for paper carriages of combined typewriting and calculating machines, such for instance as that shown in Belgian patent granted to Hubert Hopkins August 21st. 1907, No. 202,081, and French Patent No. 383,719, dated January 16. 1908. I

In an application filed by me August 7th. 1011, Serial Number (H2888, I have described the details of a carriage return mechanism part of which is herein illus trated and will therefore not give a detailed description of the same here, further than to say that the constantly running motor, not

shown, drives a pinion 1 mounted on shaft 2 which, through suitable motor gears, rotates a shaft 3 on the upper end of which is a clutch mechanism 4 whereby, when said clutch mechanism is raised by means of a lever 5, the escapement shaft 6, having pinion 7 on its upper end in mesh with rack 8 on the paper carriage. will be driven so as to move the carriage to its starting position at the right hand side of the machine. Lever 5 is engaged by a rod 9 to a carriage return key 10 whereby the carriage return mechanism may be rendered effective by manual depression of said key.

It is the object of my present invention to provide means whereby, when the carriage reaches a certain position in its leftward movement. a block 13 adjustably mounted thereon will mechanically set in operation the carriage return mechanism. whereby the carriage will be back spaced a few spaces without requiring the operator to depress the key 10.

To carry out the objects of my invention, l arrange a ta met 14 in the path of movement of the block, which tappet so mounted on the upper end of lever 15 that when the carriage is moved leftwardly, it will rock lever 15 rearwardlv and by means of the extension 16 of said lever. which is fixed thereto, and rod 17 connected to the end of extension 16. a plate 18 will be swung rearwardly. A spring 19 connects this plate with the upper end of a lever 20 pivotally .mounted on the key 1.0 so that said upper end of lever 20 will be caused to follow the plate when the levers 15-46 are rocked. The lower end .of lever 20 terminates in a hook and when this lower hooked end swings forwardly, it will engage a pin 21 on the end of a rock arm 22 mounted on rock shaft secured in a suitable bracket plate secured under the bed plate of the machine. and which rock shaft carries a rock arm 24 at its opposite end provided with a roller 2 yieldingly held against the periphery of a cam 20 mounted on the rotating shaft 2 by meansof a spring 27. The arm 22 is caused to vibrate by means of a cam 26 and when the hooked lever 20 is disengaged therefrom. such vibration is, ofi-course, idle; but when the hooked end of lever 20 is moved into engagement with the pin 21, the vibration of arm 22 will depress the key lever 10 and set the back spacing mechanism into operation. moving the carriage. The length of the periphery of the enlarged portion of the cam 26 determines the back spacing movement ofthe carriage, and while, for purposes of the machine disclosed. it is only necessary to back space the carriage about threenotches in the particular class of tabulating work for which it was designed, it is obvious thatthe enlarged portion of the cam 26 can be increased circumferentially so as to impart a greater back spacing movement to the carriage. \Vhen the enlarged por tion of cam 26 passes from the roller the pin 21 starts to rise and will release the hooked end of lever 20. as is obvious. This back spacing mechanism is designed particularlv for use in connection with totalizer selecting and controlling mechanism disclosed in a cpmpanion application filed by me of even date j herewith, Serial No. 759.493. with which it is also desirable to use the automatic fill '2. In a back spacing mechanism for ma' chines of the character described, the eomlnnatlon of a paper carriage, an escapement mechanism shaft, a constantly rotatmg shaft,'a clutch for engaging said shaft with said escapement mechanism shaft for back spacing the carriage, and means controlled by the paper carriage for rendering said back spacing mechanism effective.

3. in a back spacing mechanism for machines of the character described, the combination of a paper carriage, an escapement mechanism shaft, a constantly rotating shaft, a clutch for engaging said shaft with said escapcment mechanism shaft for back spacing the carriage. and means controlled by the paper carriage for rendering said back spacing mechanism effective, said means being mechanically driven together with said constantly rotating shaft, and the length of said back spacing movement being controlled by said mechanically driven means.

memora- 4. The combination with a paper carriage for machines ofthe class described, an escapement mechanism shaft,.a constantly to 49 tating shafaaclutch for engaging said constantly rotating-shaft and said escapement mechanism shaft whereby a spacing .isjef: fected, means for operating said clutch, and

means on the carriage for operating saidclutch operating mechanism, said clutch operating mechanism including in 'its tramv devices which control the back spacing movement. of the carriage.

v 5. The combination of a laterally movable 5) paper carriage for machines of the class described, an escapement mechanism shaft, a constantly rotatin shaft, a constantlyi roe tating cam, a clutc for engaging said shaft with said escapement mechanism shaft, and 55 means for operating said clutch to effect such engagement, said cam holding said clutch in such engagement during a predetermined portion of its revolutions.

(1. The combination of a paper carriage 60 for amachine of the class described, an escapement mechanism shaft, a constantly rotating shaft for back spacing said carriage, a constantly rotating cam, and means for rendering said cam effective to cause the 65 carriage to be back spaced. I In testimony whereof I hereunto afhx my signature in the presence of two wltnesses,

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Patents,

Washington, 1). G. 

